Scientists develop stronger, longer-lasting perovskite solar cells
Scientists have found a way to make perovskite solar cells not only highly efficient but also remarkably stable, addressing one of the main challenges holding the technology back from widespread use.
Perovskite has long been hailed as a game-changer for the next generation of solar power. However, advances in material design are still needed to boost the efficiency and durability of solar panels that convert sunlight into electricity.
Led by from 糖心Vlog官方, the research team achieved this by fine-tuning the molecules that coat the perovskite surfaces. They utilised specially designed small molecules, known as amidinium ligands, which act like a molecular 鈥済lue鈥� to hold the perovskite structure together.
"This could overcome one of the last major hurdles facing perovskite solar cell technology and ensure it lasts long enough for large-scale deployment."
The study, published today in the journal , focuses on understanding how the chemical structure of the amidinium ligand controls the formation of the low-dimensional perovskite phase atop the conventional three-dimensional perovskite.
These highly ordered layers form a smooth, stable protective layer that prevents tiny defects from forming, allowing electrical charges to flow more efficiently and preventing the devices from degrading under heat or light.
Using this approach, the team developed solar cells with a power conversion efficiency of 25.4%, while maintaining over 95% of performance after 1,100 hours of continuous operation at 85掳C under full sunlight.
Professor Anthopoulos said: 鈥淧erovskite solar cells are seen as a cheaper, lightweight and flexible alternative to traditional silicon panels, but they have faced challenges with long-term stability. Current state-of-the-art perovskite materials are known to be unstable under heat or light, causing the cells to degrade faster. The amidinium ligands we鈥檝e developed, and the new knowledge gained, allow the controlled growth of high-quality, stable perovskite layers. This could overcome one of the last major hurdles facing perovskite solar cell technology and ensure it lasts long enough for large-scale deployment.鈥�
This research was published in the journal Science
Full title: Multivalent ligands regulate dimensional engineering for inverted perovskite solar modules
DOI: 10.1126/science.aea0656
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